But it turns out that on Macs and if you have the right software on PCs, you can kind of get a teaser of what this environment tends to look like and be forewarned, what you're about to see is intentionally very underwhelming.

事实上，它是运行在苹果机上的,如果你在电脑上有正确的软件，可以去看看这个环境大致是怎么样的,提前说下，这个程序不会让你印象深刻,我是故意这样做的。

哈佛公开课 - 计算机科学课程节选

So, it frees you from some of Apple's tethers and this was the code that circulated on the Internet iPhone with which people could crack their iPhones.

这样我们就从苹果的约束下解放出来,这些代码是在网站上流通的,使用它们可能损坏你们的。

哈佛公开课 - 计算机科学课程节选